Question 1204225


{{{17-( (t-60)/5)*3>=5}}}

{{{53 - (3 t)/5>=5}}}

{{{t<=80}}} 


They can play for {{{80min}}} or {{{1}}} hour and {{{20}}} minutes from the beginning of the game.


check this way:

Start playing with {{{17}}} players.

At {{{1:00}}} hour, there are {{{14 }}}players left.

At {{{1:05}}}, there are {{{11}}} players left.

At{{{ 1:10}}}, there are {{{8 }}}players left.

At {{{1:15}}}, there are {{{5 }}}players left.

At {{{1:20}}}, there are {{{2 }}}players left, and play stops.

so, they can play for {{{1 }}}hour and {{{20}}} minutes from the beginning of the game